Method for transforming switch special language into C language

Abstract

The invention provides a method for transforming a switch special language into C language. In the method, a preprocessing module, a symbol list unit, a transformation processing module, an annotation preprocessing module and an annotation processing module are provided, wherein the preprocessing module comprises an LEX lexical analyzer and a Yet Another Compiler-Compiler (YACC) analysis program generator; the annotation preprocessing module comprises an LEX lexical analyzer and a YACC analysis program generator; the annotation preprocessing module comprises an LEX lexical analyzer, wherein source codes of the switch special language are imported into the preprocessing module and the annotation preprocessing module to be processed and then sentences and annotation contents which produce a global symbol table and a syntax tree format are obtained; and then final C language codes with the annotations are generated through the transformation processing module and the annotation preprocessing module. The method realizes the transformation of the switch special language into the C language, and the C language is provided with the annotations and is highly readable.

Description

【Technical field】 [0001] The invention relates to the technical field of special language for switches of computers, in particular to a method for converting the special language of switches into C language. 【Background technique】 [0002] Most of the old large-scale program-controlled switches currently in operation use dedicated hardware and switch-specific languages. However, with the upgrading of computer hardware and the popularity of general-purpose high-level languages. The old large-scale program-controlled switches face problems such as hardware upgrades, special-purpose language compiler upgrades, and operating efficiency. These problems urgently require that the special language of the switch be converted into a general high-level language (such as C, C++ language), so as to maintain and upgrade the function of the system. [0003] The conversion principle of high-level languages ​​is the same as that of compilers. Basically, it is converted into an intermediat...

AI Technical Summary

Problems solved by technology

However, the switch special language has its special features. For example, the special language is relatively complex, without comment processing, and the readability is very low; in the existing high-level languages, it is basically processed in units of Byte, and only some compilers, Such as gcc (compiler), use "_attribute_((packed))" to specify the special memory mode of the data type

But the "PACK / NO_PACK" rules of the switch-specific language are far more complicated than this, which leads to difficulties in language conversion

The usual language conversion tools don't come up with a good way of doing this

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